<?php


/*
 V5.10 10 Nov 2009   (c) 2000-2009 John Lim (jlim#natsoft.com). All rights reserved.
 Contributed by Ross Smith (adodb@netebb.com).
 Released under both BSD license and Lesser GPL library license.
 Whenever there is any discrepancy between the two licenses,
 the BSD license will take precedence.
 Set tabs to 4 for best viewing.

 */

if (!function_exists('mcrypt_encrypt')) {
    trigger_error('Mcrypt functions are not available', E_USER_ERROR);
    return 0;
}

/**
 */
class ADODB_Encrypt_MCrypt {
    /**
     */
    var $_cipher;

    /**
     */
    var $_mode;

    /**
     */
    var $_source;

    /**
     */
    function getCipher() {
        return $this->_cipher;
    }

    /**
     */
    function setCipher($cipher) {
        $this->_cipher = $cipher;
    }

    /**
     */
    function getMode() {
        return $this->_mode;
    }

    /**
     */
    function setMode($mode) {
        $this->_mode = $mode;
    }

    /**
     */
    function getSource() {
        return $this->_source;
    }

    /**
     */
    function setSource($source) {
        $this->_source = $source;
    }

    /**
     */
    function ADODB_Encrypt_MCrypt($cipher = null, $mode = null, $source = null) {
        if (!$cipher) {
            $cipher = MCRYPT_RIJNDAEL_256;
        }
        if (!$mode) {
            $mode = MCRYPT_MODE_ECB;
        }
        if (!$source) {
            $source = MCRYPT_RAND;
        }

        $this->_cipher = $cipher;
        $this->_mode = $mode;
        $this->_source = $source;
    }

    /**
     */
    function write($data, $key) {
        $iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
        $iv = mcrypt_create_iv($iv_size, $this->_source);
        return mcrypt_encrypt($this->_cipher, $key, $data, $this->_mode, $iv);
    }

    /**
     */
    function read($data, $key) {
        $iv_size = mcrypt_get_iv_size($this->_cipher, $this->_mode);
        $iv = mcrypt_create_iv($iv_size, $this->_source);
        $rv = mcrypt_decrypt($this->_cipher, $key, $data, $this->_mode, $iv);
        return rtrim($rv, "\0");
    }

}

return 1;

?>
